Yep, the popular weather plugin for Vista has been modified to support 7MC. x86 and x64 download versions for Heatwave v1.2 are available here.

Here is a list of a few other additions to this pre-release version:

• A widescreen layout is now included. If you don’t like it, it can be disabled in Settings on the Appearance page.
• There is a day/night (sun/moon) forecast indication next to the location title. If you don’t like it, it can be disabled in Settings on the Appearance page.
• The layout of the main page has been tightened up a bit (the data refresh times have been lost in this version, however will return in a later version)
• The various times will now be formatted according to the system time format
• The temperature ranges are now presented in high-low order. You can flip them back to the way they were in Settings on the General page.
• Changed the formatting of temperature ranges to make negative temperatures more legible